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Water chilling unit

A chiller and compressor technology, applied in refrigerators, compressors, refrigeration and liquefaction, etc., can solve the problems of large control error, poor heat transfer capacity, sensor error, etc., to solve high noise, improve performance and use comfort Sex, the effect of reducing the amount of charge

Inactive Publication Date: 2016-04-06
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional refrigeration compressors rely on bearings to provide support and require refrigeration oil as lubrication. When the unit is running, a large amount of lubricating oil enters the system and affects the heat transfer capacity of the heat exchanger. In addition, there is mechanical friction, which causes great vibration and noise.
[0003] However, the flooded and dry evaporators commonly used in chillers have disadvantages such as poor heat transfer capacity and large refrigerant usage, which also have a very bad impact on the performance of the unit.
The unit control mainly adopts the superheat control, and the sensor error and control error are large

Method used

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Examples

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Embodiment 1

[0041] Such as figure 1 As shown, in this embodiment, the chiller 100 includes: a compressor 1, a condenser 2, an evaporator 3, a first throttling device 4, a control device, a liquid level sensor 7 and a cooling flow path 6, wherein the compressor 1 It is a centrifugal magnetic levitation compressor, and the compressor 1 has an exhaust port a and an air return port b. The evaporator 3 is a falling film shell-and-tube heat exchanger, and the evaporator 3 has a refrigerant inlet d and a refrigerant outlet e. The first throttling device 4 is an electronic expansion valve.

[0042] The first end of the condenser 2 is connected to the exhaust port a, the refrigerant outlet e is connected to the air return port b, and the two ends of the first throttling device 4 are respectively connected to the second end of the condenser 2 and the refrigerant inlet d.

[0043] The control device is connected with the compressor 1 and the first throttling device 4 , the control device can contr...

Embodiment 2

[0051] Such as figure 2 As shown, in this embodiment, the difference from Embodiment 1 is that: the compressor 1 also has an air supply port c, and the chiller 100 also includes an economizer 5 . Such as figure 2 As shown, the economizer 5 includes a heat exchange module 51 and a second throttling device 50 .

[0052] The economizer 5 has a first refrigerant passage and a second refrigerant passage that exchange heat with each other, and the first refrigerant passage and the second refrigerant passage define a heat exchange module 51 of the economizer 5 . Such as figure 2 As shown, the flow direction of the first refrigerant channel is from P4 to P1, and the flow direction of the second refrigerant channel is from P2 to P3.

[0053] The inlet of the first refrigerant channel is connected to the first end of the second throttling device 50 , the outlet of the first refrigerant channel is connected to the air supply port c, and the second end of the second throttling devic...

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PUM

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Abstract

The invention discloses a water chilling unit. The water chilling unit comprises a compressor, a condenser, an evaporator, a first throttling device and a control device. The compressor is a centrifugal magnetic-levitation compressor and is provided with an exhaust port and an air return port. The first end of the condenser is connected with the exhaust port. The evaporator is a falling film type shell tube heat exchanger and is provided with a refrigerant inlet and a refrigerant outlet, wherein the refrigerant outlet is connected with the air return port. The first end of the first throttling device is connected with the refrigerant inlet, and the second end of the first throttling device is connected with the second end of the condenser. The control device is connected with the compressor and the first throttling device so as to control the working state of the compressor and the working state of the first throttling device. According to the water chilling unit, the problems that a water chilling unit is high in noise and large in vibration, and the heat exchange capacity of a system is poor due to refrigeration oil are solved, the performance and use comfort of the water chilling unit are improved, and the refrigerant charge of the water chilling unit can be greatly reduced.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a chiller. Background technique [0002] Traditional refrigeration compressors rely on bearings to provide support and require refrigeration oil as lubrication. When the unit is running, a large amount of lubricating oil enters the system and affects the heat exchange capacity of the heat exchanger. In addition, there is mechanical friction, which causes great vibration and noise. [0003] The flooded and dry evaporators commonly used in chillers have disadvantages such as poor heat transfer capacity and large refrigerant usage, which also have a very bad impact on the performance of the unit. The unit control mainly adopts superheat control, and the sensor error and control error are large. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the present invention propo...

Claims

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Application Information

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IPC IPC(8): F25B1/00
CPCF25B1/00
Inventor 刘冰杨崇银李超刘开胜
Owner CHONGQING MIDEA GENERAL REFRIGERATING EQUIP